[PATCH] D72120: AMDGPU/GlobalISel: Fix G_EXTRACT_VECTOR_ELT mapping for s-v case

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: tstellar, nhaehnle, kerbowa.
Herald added subscribers: Petar.Avramovic, hiraditya, t-tye, tpr, dstuttard, rovka, yaxunl, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

If an SGPR vector is indexed with a VGPR, the actual indexing will be
done on the SGPR and produce an SGPR. A copy needs to be inserted
inside the waterwall loop to the VGPR result.


https://reviews.llvm.org/D72120

Files:
  llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-extract-vector-elt.mir

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